The customer service number for Boost Mobile is 1-866-402-7366. Representatives are available to provide assistance Monday through Friday from 4 a.m. to 8 p.m. PST and Saturday and Sunday from 4 a.m. to 7 p.m. PST.
Boost Mobile also provides support via email. A contact form can be accessed by choosing Contact Customer Care under the Support link on Boost Mobile's home page. Also under the Support link, there is an option for Frequently Asked Questions where users can find answers to some common questions, including how to get started, how to use the phone, how to send a text, how to use voicemail and how to troubleshoot common issues.